Sewing-machine.



A. R. SOHOENKY. SEWING MACHINE.

APPLICATION FILED PEB.27, 1912.

Patented M5126, 1913.

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A. R. SCHOENKY.

SEWING MACHINE. APPLICATION FILED 21:13.27, 1912.

Patented Aug.26,1913.

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APPLICATION FILED FEBZ'I, 1912.

Patented Au zfi, 1913.

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A. R. SCHOENK'Y.

- SEWING MAGHINB. APPLICATION rum) PEB.27, 1912.

Patented Aug. 26, 1913.

4 SHEETS-SHEET 4.

i To all iv/m,Mindy-concern:

bomerville, in the county of M iddlesex and State of ivlassachusetts,havei nventedceb ing-Machines, of which the following isla;

. the welt system, wherein the outsole and this'in the present inventionby means of a byQt-he-operator serves the double function machine, an Qnovel features in the cla1m's.

a. I v ew-of a-machme embodying my 1nvent1on.

inlFigyl involved in the present invention 1 at thfeiaune being seenfrom the samepomtof UNITED A B AUGUST 3. scnonnxv, or SOMERViLLE,massacnnsmrs, assrsnonl'ro'rnn RnEcE SHOE MACHINERY COMPANY, or BOSTON,massacgsusmzrsconronanon or I MAINE.

SEWING-MACHINE.

Application ma as 1.1912; fs ria n ssossep lie it knownthat l, Ai'oUsrR.SoIroEnKv, a citizen of the Unit-ed btates, resldmg at tain new anduseful Improvements .infSewF specification, reference being had thereinto}: the accompanying drawing.

My invention relates to sewing machines, and more particularly tothatclass of ma-- chines used in the manufacture of shoes by welt aresewed together. An example of that class of machine is illustrated in U.S. Patent No. 473,870 of April 26, 1892, and that patent discloses anddescribes many features and details which may be referred to to supplycorresponding features and details ,not specifically illtistrated andset forth in the, present application.

objectof the present invention is to generally improve the constructionand operation of sole sewing machines of all classes including as anexample that of the prior I patent above mentioned.

A special objectof the present invention is to improve the operationoractuation of the presser foot and to enable it to be opened at anydesired point in the progress of the work. Particularly it is proposedto effect .singl'eilever or treadle which when moved *of; first.releasing the devices which hold or clgampithe 'pres'ser foot inposit-ion, and sec- .ond' liftin the presser foot.

Other 0 jects will appear duringthe fol- .lowing description of aparticular embodiment of .the present invention.

- vTo these ends the resent invention consists in the novel mec anisms,combinations, arrangements, features and parts as herein .afterlllustrated and described. I

I will first describe oneform in which my invention may be embodied in asole sewing; will thereafter point out the;

:Inthe accompanying drawings forming a part hereof, Figure 1 is aright-hand end ,Figg'ef shows somewhat diagrammatically the moreimportant of the elements shown,

an i

view as F ig. 1:but at a different" stage of operat on. Fig. 3 is a viewsimilar to Fig. 2 Wltll the :parts in a'still further stage ofoperation. Fig. t is a view similar to Figs. 2 and 3 with the parts in astillfurther stage ofoperation. Fig. 5 is a detail showing in right-handview the relation of the two pawls with the lever for throwing them outof their engagement with their dogs. Fig. (S is a right-hand viewthereof. Fig. 7 isv a partial left-hand elevation of the parts shown inFigs. 1-4 together with additional parts having to do with the measuringof thread. Fig. 8 is a partial front elevation of th'e'partsshown inFig. '7. a.

Similar letters of reference designate corresponding parts in theseveral .figures of the drawings. I

I will first describe some of the parts of" the machine already known-inthe prior patent referred to. It will be noticed that the view of Fig. 1corresponds generally with the right-hand end view constit-utingFig. 3of the aforementioned prior patent. In fact the general arrangement. ofsaid prior pat-- ent has been adopted herein as convenient forthe-purposes of illustration, and the front view shown in the firstfigure of said prior patent, and the top view shown in the secondfigure, may be considered as generally representing the location andarrangement of the shaft, cams and other main parts, so that it isbelieved the present application need not be complicated by includingfront and top'views, especially .as the features of improvement hereinto be described and claimed, are adequately illustrated in principle anddetail in the accompanying figures. In Fig. 1 hereof thelou'er portionsof the frame are cut out for the purposes of condensation and thetreadle rod is likewise broken off, it being understood-that in thecomplete machine the work support and adjacent parts will be at aconvenient height above the floor or base to best facilitate theoperator in the sole sewing operations performed on this machine.

The fixed frame parts A, A may be of any preferred design to properlysupport the operative parts of the machine. Among the operative parts isthe main shaft, A

shown arranged horizontally, it being supposed to have at the endfarthest from the observer ,in'Fig. 1 a driving pulley, andcarrying-also Substantaally all of the operating cams of the machine. Among suchcams is a cam omitted from the drawings herco f, lo

' upright. or stamlard ll, at whose upper end is seen a llXOdSllHl 0.upon which may be l'nountcd in the usual manner an awl segment. In theupper right-hand part of Fig. l is seen a longitudinal shaft or stud F,to which certain other members of the machine are tilted, as willhereinafter appear.

(lertain portions of. the mechanism of a sole sewing machine to whichthe present invention wr so has no relation, are entirely omitted forconvenience and clearness of illustration. The work support (Z hereofmaybe stationary as shown. The prcsser foot 0 may be of any convenientform such as that indicated, and when the work sup port"isstationary thepresser foot will be (-:i. nil. le,"o'I? moving l'rom' and toward thewort: support. Said presser foot is shown as carried on the forward armof a curved lover a, which is pivoted upon'a stud c, said .lerer 0having a. rearward extension as show-n.

livoted also on stud 1: is an arm 1", extending above the rearwardportion of le- \er a. sliding link a. affords a connection hetwcentherearward extremities of lever-c and arm c. it being connected to them asfollows. Link a is pivoted upon a stud- 0* on lever a, and it extendstherefrom througl'i an apmturein alug 0" formed upon arm (1*. Beyond thelug c is a sleeve or elongated washer e, and beyond that is a helicalspring a confined between the washer e and a regulating nut 6 by whichthe compression of the spring a isregulated. The

link 0 will pass suiticiently loosely throughthe aperture in lug e topermit a moderate, relative movement as between lever e and arm thespring o tending to hold the lever and arm toward each otherw Thepurpose of the. arme and the rearward part of lever c is to afford aplurality of cooperating movable lnen'ibers'for carrying correspoudiugratchet toothed racks or dogs a,

0", the latter in turn for cooperating with pawls c and 6" respectivelyin the actuation of the presser foot. The pawls a and (a l may in factconsist of two or more pawls of varying lengths for the purpose of fineradjustment, and for the same purpose the dogs c, a may if desired havetinerteeth than as shown. The pawl'c is shown pivoted upon a swinginglever which is fulcru'med upon a fixed stude, said lever having a rollerat e for engaging groove 0" in cam C. In this way the canris able tocfi'ect the swinging of the lever andthe up and down movements of thepawl and dog a 'l he pawl e" engages the dog o en the lever 6, and saidpawl is loosely mount on -a stud e rendered fixed by attachment to aportion of the frame of the machine. 'Pawl c" has a rearward extension 0normally acted upon by a spring a which keeps said pawl. a" inengagement with dog '6 The pawl e is likewise acted upon bya suitablespring 0' carried by the lover a, thus keeping it'normally in engagementwith dog 2.

At this point we will suspend the description of the pawls and dogs andtheir manner of operating the presser foot, and will proceed to describecertain other parts of the' mechanism.

.Parts of the thread measure regulating means are indicated and willnowbe referred to. Depending from the rearward end of lever e is anupwardly anddownwardly moving member which may be termed a frame f,whose position at all times obviously depends upon the position of thepresser foot. The lower end of theframe is slotted and it straddles therock shaft f which guides it. A'member f which may be termed a slide boxis adapted to oscillate slightly, it having its lower end plV0tBllyconnected at f, directly or indirectly, to the frame The upper end ofthe slide box f is pivotally connected to a substantially horizontalconnecting rod f, which when actuated causes the oscillation ofthe slidebox. The fear side of the slide-.box f is vertically slotted to receivea slide-block f, surrounding a stud f provided at the upper end of ashort oscillating arm f cured upon the beforement-ioned transverse rockshaft f. These parts per 86 form no part. of the present invention. Therock shaft f controls the thread measuring as follows: At its left endas seen in Fig. 8 it carriesa' forwardly extending arm g havno ing athread roller or pulley at its outer end. The thread t from the wax potand tension passes forwardly making a turn and a quarter around thethread wheel t';whence the thread passes to the pulleyg and around it,thence to and aroundv a thread lock wheel g, thence to and aroundthe'auxilia-ry take-up y and thence to and around the. main take-up gwhence the thread passes. to the loopers and needles. The lock wheel y129 is adapted to be contacted l) .afshoe y at intervals to lock thethread.illvhile the thread is locked the take-up gfizoperates to take upthe thread from the previous stitch and at the same time the measuringwheel g rises and descends to draw from the supply and thence measureoff the proper quantity of thread for the succeeding stitch. The controlof the amount of thread measured will now be understood. The thicker noworklbeneath tghe presser foot, the lower willbe-the no'rmal' positionof the frame f.

"Therefore agiven oscilla tion'of the slide box ff will eifect' agreater oscillation of the thread measuring levers than would be theease with a-piece of thin work beneath the presser foot. 1

The manner of actuating the connecting rod 7' may be as follows. It isshown pivotally connected at f to the downward arm of a bell crank leverf mounted on the fixed stud F before mentioned, while the horizontal orforward arm of bell crank lever f has at its forward end a roller f 7venientpoint in the frame and pressing upwardly yieldingly against thelower end .of the frame f already mentioned. The

work Z, such as the sole of a shoe, is shown as lying between the worksupport (1 and presser foot 6 the latter being held down yieldingly asjust explained. The pawls and dogs are now to come into play to forcibly clamp the work during the operation of the awl -and the needle. Thisclamping is initiated by the eccentric portions of cam grooves e actingupon the roller 0 of lever e The lever on being lifted after having beenlowered causes the pawl e to engage dog a, the pawl 6" being at the sametime permitted to engage dog 6 On swinging upwardly the lever e actingthrough pawl (1 and dog e effects the lifti-ng of the arm 6 carrying dogc". This in turn imposes compression upon the strong spring a, whichacting through rod e pulls up upon the rear end of lever e, thereby(forcibly pressing down the presser foot e with a pressure which may beregulated by increasing or decreasing it according to the character ofthe stock, by the adjustment of the nut c. As this takes place, the pawle" whether it is single or multiple, engages itself in the dog e so asto lock and hold firmly down the )resser foot against the stock. Whilein this position the awl-will rise to perforate the stock, andthereafter the feed slide B and upright B carryii'ig the awl will shiftfor feeding the stock. This feeding obviously could not take place withthe stock under heavy clamping pres sure, and therefore before the awlcom-' mences the feeding movement, the pressure of the presser footmustbe released. This is effected by the depression of the lever e bythe cam groove a, this effecting first the ll disengagement of the pawle from its dog",v l after described,

from its dog. The former disengagement fixed pin or stu spring n"- atthe time the feeding takes place.

while not identical, correspond to some exaud as amatter of convenienceall of the reference characters above employed are patent. In said priorpatent when for some readjust the Work before completion, he would liftthe presser foot by means of the hand lever 6", but before he could dothat,

connect both pawls and dogs. If therefore it was possible at all for theoperator to lift the pawls by hand, it thus was necessary for theoperator" to perform at least two independent hand operations forreleasing the work, whereas the work itself is required to be heldfirmly by the operator. In the mechanism hereinafter to be described,the operator is permitted to release the work without removing eitherhand therefrom, and as will be seen this is permitted by my invention tobe effected by a single action, thatis the movement of a single leversuch as a foot treadle, which ing the' pawls and dogs, and secondlifting the presser foot. The details of this and of the subsidiaryparts of my present improvement will now be described.

One element of m improvement consists of a member R in tile form of alever constructed and arranged to release both pawls c and c. This pawlreleasing member is pivotally mounted on the same stude that carries thepawl e", and it may comprise besides its main'orhorizontal portion R anupward-extension r so shaped as to contactwith pins 1" and i mountedrespectively on the sides of the pawls e", 6, whereby the lever B onbeing swung will niove both pins and thereby lift both pawls from theirrespective dogsz The extension purpose of clearing the fixed stud 89alrea y referred to, and. the recess may be so shaped that the stud 89will form a 'convenient stop to prevent excessive movement of'the leverB. The pawl releasing lever is to have convenient connections so that itican be actuated at will, as will be hereinand to permit this it isproand then the disengagement of the pawl c is caused by the awl cstriking against a f I 89, which lifts' the pawl," against theresistance of its spring. The latter operation is effected by the heel1S9 of lever 63 striking the heele of pawl e". Thus the presser foot isbearing upon the; I

stock only with the slight force due to All of the parts hereinabovedescribed ii performs the two operations of first releasindicated in allthe figures hereof, but is best shown in Figs. 5 and 6. It may be tentwith parts shown in Patent No. 473,870,

taken as far as possible .from said prior reason the operator desired toremove or.

it' would first be necessary for him to dis- 1" may be recessed orshaped at? for the and the elevation of the presser foot.

vided at r with a lateral projection or'extension.

My improvement also contemplates a movable or=depressible part whichwhen depressed will cause the elevation of the presser foot. Of courseany part such as a lever could be employed as a presser foot lifter. Forthe purposes, however, of my invention, the part that is to serve thispurpose should have a suitable locationfin the machine and at the sametime should not be in the way so as to interfere with other mechanism.To carry out the ends hereof, I have conceived the idea of employing asa presser foot lifter, a certain member that is already in use in themachine for another purpose, namely one of the members that takes partinactuating the thread measure.-

This member is the aforementioned rod f which is longitudinallyoscillated by the lever f at the rear end so that at the front end itwill effect the oscillation of the slide block f foractuating the threadmeasuring" device.

It will be. observed that although the rod, 1 is. intended to. belongitudinally oscillated, it is so connected to the lever 0 through theframe f that the depression of the rod f causes the depression of thelevir 8 an incidental to rendering the rod f more adaptable to thefunctions it is to perform under my invention, I have'recessed itsupperv side to form a bearing surface s, by

which the rod may be depressed, and this surface will be of such lengthas to freely permit the oscillations of therod notwithstanding the entryinto the recess ofthe part which is to depress it.

Another feature contemplated in my inventionis enabling the lifting ofthe presser foot without requiring the opcrator to remove either. handfrom thework for that purpose. To this end a lever is employed operabli?by the knee or foot, for example thethreadle T hinged at its rear at tand acted upon by a spring t which tends'to hOhl'lt elevated whilepermitting its depression by the foot of the operator. A treadle rod Itextends from an intermediate point of the treadleupwardlyto where at itsupper end it is pi'votally connected to the forward end of an arm twhich extends- --barwardly' to where it is secured upon a shit-l t ttfitted in suitable stationary bearings so as to be capable of a slightrotation. The arm t. will be conveniently located with respect-to thelength of the shaft It, so as to permit the treadle to be convenientlylocated for the foot and directly beneaththe arm ti At another pointupon the shaft t to the right of arm t, that is between that arm and'theobserver in Figs, 1, 2, 3, 4, IS a second arm 1 extending forwardly andhaving atits forward end a contact, such for example as the adjustablecont-actserew t. The contact t is intended to act upon so as to depressthe presser foot lifter f9, and to this end the conta'ct'will either belocated directly over the lifter or'ove'r an intermediate element as 1"which in'turn is located over the lifter. By the described arrangementit will be seen that on depressing the treadle the shaft 18" isswung'and the contact 15 causesthe rod f to move downwardly, therebylifting the presser foot.

My present invention alsocontemplates that a single lever shall effectboth operations, namely the disengagement of the pawls and dogs on theone hand, and the lifting of the presser foot on the other hand.

'This is permittedin the described construction since the lever ortreadleTis connected not only to actuate the presser foot lever f",

but is. also connected so as to throw the pawl releasing member R. Thusit has already been described that the member R has a fore thepresser-foot lifter is actuated. This result is secured by the factthatas seen in Fig.2 the pawl releasing members extension '1' is spacedslightly above the resser foot lifting rod f, the consequence 0 which isthatv in depressing the foot treadle, contact t causes first the releaseof the pawls followed-in the same operation andpracticallyinstantaneously, by. the depression of the rod f and therebythe lifting of .the

presser foot.

By the above described mechanism, all of the objects hereinbeforerecited are attained, and other objects, which will be apparent to thoseskilled in. the art.

The operation of the mechanism as a. whole will be sufiicientlyunderstood from the above description, but the following. furtherstatement willbe of assistance in giving a full understanding of theimprovement. Fig. 1 shows the work Z under the heavy compression of thepresser foot 4: that prevails during the operations of the awl andneedle, the lever e being here held 11 wardly by the cam groove 0"acting on roller e. In this figure both of the pawls e eTare seen' to bein engagement with both of the dogs a, ,e, the presser foot beingthereby locked in clam ing position.

The foot treadle is in upwar gosition and is inactive. Fig. 2 shows a dierent stage of operation. During each feeding movement as the line ofstitches is 'formedthe some:

work-must be suliiciently unclampedto permit relative feedingmovemenig', andv this must occur at regular... intervals. The cam groove6 eflectis.th1s by causing the depression of the lever e 9, which aspreviously ex' plained, automatically effects the disengage ment of boththe 'pawls from their respective The figure; shows the pawls disendogs.gaged. The figurdalso shows a slight space between the work and thepresser foot, merely as conveniently indicating that. the

' heavy clamping pressure is not in force.

T he presser foot, however, is held downlightly by the force of springn.If new the operator desires to raise the presser foot whether. at theend of the operation or at if the treadle Tbe depressed, the first thingi that will occur-will be the release of the 'pawls, and this stage ofthe operation is shown in-Fig. .3. The treadle rod t has been pulleddownwardly to cause the arm t to swing downwardly, the contact t therebyforcing downwardly the extension 1* of the pawl releasing member It,thus releasing the pawls' as shown. By comparisolrwitli Fig.

2, the contact t and the extension 1" will be seen to have been}depressed, but the rod f is not 'depressedL The descent of the treadle'1 being continued, the contact If and extensionr having come intocontact with the upper surfaces of the presser foot lifter f, thelatter'begins-to move downwardly and the three parts continue theirdownward movement together to the position shown in Fig. 4. This causesa decided lowering of the left end of the presser foot lifter f ittright end being supported against possibility of depression. Its leftend being connected as aforesaid withtheirame f, moves that framedownwardly, and with it is carried downwardly the right-hand end oflever a, whose left-hand end is therefore lifted, carrying with it thepresser foot 0 which as seen in Fig. 4 is considerably above the work Z.e

I have thus in the above described mechanism veryconveniently andeffectively carried out the purposes hereof. It is obvious that thedetails of theelements, their form and arrangement, may be variouslymodified, and I therefore do not intend to. impose any restrictions onmy broad invention except as set forth in the appended claims.

This improvementinvolves the novel combination of apresser foot, emovable toward and from the. work, and means (comprising thecam arm a"and the pawls, etc.),

1 forinterm ittently clamping the presser foot upon the work, and adevlce (the lever It) for releasing or tripping the clamping and -part,whether I the treadle, or

rod-8, 01 armtt, or extension 1-, which is shiftable or de'pnessible atwill and isarerative movement. It will be noticed that when thetreadleis-depressed it does not lower the arm e", and the pawls aremerely,

tripped to unlock the presser foot without first'reducing and releasingthe heavy pressure. v

'What I claim-anddesire to secure by Let-.

ters'Patent is I y v 1. In combination, a presser foot movable towardand from the work, amovable arm having means for automatically operatingit during aportion of each stitch to clamp the presser foot forcibly uon'the work, a releasing device indepen ent of said arm but adapted whenactuated to release the presser foot from the clampin action of saidarm,

ranged-to first operate the releasing device I and to then lift thepresser foot, in one opand a part or lever shlftable at the will of theoperator adapted when shifted to first actuate the said releasing deviceand then lift the said presser foot.

2. In combinatioma presser foot movable towar'dand from the work, amovable arm having means for automatically operating it during a portionof each stitch to clamp the presser foot forcibly upon the work, areeasing device independent of said arm but adapted when actuated torelease the presser foot from the clam ing action of said arm, a movablepresser oot lifter or arm having a movable connection with the saidpresser foot, and a part or lever "shiftable at the will of the operatoradapted when shifted to first actuate the said'releasing device and thenactuate the said lifter.

3. In combination a presser foot movable toward and from the work, meansfor intermittently clamping the presser foot forcibly u on the work, adevice for releasing said 0 amping means, a presser-foot lifter, and apart shiftable at will constructed and arrangedto first operatively movesaid device, and on continued movement to cause said device to move saidlifter.

4. In co bination, a presser foot movable toward an from the work, amember connected to and movable in unison with said presser foot adaptedto control a thread measuring device, means for intermittently clampingthe presser foot upon the work and a part or lever operable at will forfirst eflecting the release of said clamping means, and then-shiftingsaid member to lift the presser foot.' y

5. In combination, a presser foot movable toward and from the work, amember connected to and movable in unison with said presser foot adaptedto control a thread measuring device, means for intermittently clampinthe presser foot u on the work, a device or releasing said camping-means,

I shifting said member to lift the presser foot.

(5. In combination, a presser foot movable toward and from the work,devices and power connections for intermittently clamp ing the presserfoot upon the work, a releasing device independent of said connectionsadapted when shifted to release said clamping devices, a lifter adaptedwhen shifted to lift the presser foot, and a part shiftable at willconstructed and arranged to shift said rel using device and lifter so asto first release said clamping devices and then lift the presser foot. v

7. In combination, apresser foot movable toward and from the work,devices and power connections for intermittently clamping. the presserfoot upon the work, a releasing device independent of said connectionsadapted when depressed to release said clamping devices, a lifteradapted when de-' pressed to lift the presser foot, and apartdepressible at will constructed and arranged to depress said releasingdevice and lifter, the lifter being spaced below the releasing devicewhereby the clamping devices are first released and the presser footthen lifted.

8. In combination, a' presser foot movable toward and from the work,devices and power connections for intermittentlyclamping the presserfoot upon the Work, a releasmg device independent of said connectionsadapted when depressed to release said clamping devices, a lifteradapted when depressed to lift the presser foot, and a 'part depressibleat will constructed and arranged to depress said releasing device andthe latter arranged to depress the lifter in such wise that the clampingdevices are first released and the presser foot then lifted;

9. The combination with a presser foot,

movable downwardly upon the work and upwardly, a part or frame movableupwardly and downwardly in unison therewith, thread measuring mechanism-con-' trolled by said frame, presser foot clamping means, aclampreleasing device, and asingle lever having connections for firstoperating said releasing device and then lifting the presser footthrough said part or frame.

10. The combination with-a presser foot,

movable downwardly upon the work and a depressible rod havingconnections for ele-' vating the presser foot, a depressible clampreleasing lever'located over said rod, and means for depressing saidlever and thereby said rod, at will, said lever normally spaced abovesaid rod, whereby theclamping device is released before the presser footis lifted.

12. The combination with a movable presser foot, of a clamping devicetherefor, a depressible rod having connections for elevating the presserfoot, a depressible clamp releasing lever located over said rod, and afoot treadle having connection with, for depressing said lever andthereby said rod,

at will, saidlever normally spaced above said rod, whereby'the clampingdevice is I released before the presser foot is lifted;

In testimony whe'eof I afiix my signature in presence of two Witnesses.

- AUGUSTR. SCHOENKY.

Witnesses THOMAS J. CARTY," IIAROLD J. W000.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, I). G. I

